Information representation: แบบฝึกหัด

• a.

  The file size decreases and the dynamic range of the sound improves.

• b.

  The sound is converted from mono to stereo, doubling the storage requirement.

• c.

  The number of bits used per sample increases, allowing for more volume levels.

• d.

  The file size increases and the accuracy of the sound representation improves.

• a.The image representation consists of a file header followed by a sequence of binary pixel data.
• b.Increasing the size of the image causes the individual pixels to become visible, resulting in a loss of quality.
• c.The file size is directly determined by the number of pixels and the color depth of the image.
• d.The data is stored as a drawing list, where each item is defined by its geometric properties and attributes.

• a.The result is stored as \( 0_{10} \) because the subtraction of two equal magnitudes in a 10-bit system always results in a carry-out that is discarded.
• b.An arithmetic overflow occurs because the mathematical result is \( 512_{10} \), which exceeds the maximum positive value of \( 511_{10} \) representable in this format.
• c.The result is stored as \( -512_{10} \) and the overflow flag is not set because the resulting bit pattern \( 1000000000_{2} \) is within the valid representable range of the register.
• d.The result is \( 512_{10} \) and is stored correctly because a 10-bit register can represent unsigned values up to \( 1023_{10} \).

• a.ASCII and Unicode are identical in the way they represent non-English alphabets such as Cyrillic or Kanji.
• b.Unicode is a lossy method of character encoding designed to save space, while ASCII is a lossless method.
• c.ASCII uses 16 bits per character to allow for international symbols, whereas Unicode is restricted to 7 or 8 bits.
• d.Unicode can represent a much larger range of characters and symbols from many different languages compared to standard ASCII.

• a.

  It replaces binary mapping with vector-based drawing lists for every character in the set.

• b.

  It applies lossy compression to character bit-patterns, allowing more symbols to be stored in the same space as ASCII.

• c.

  It restricts every character to a 7-bit code to maximize compatibility with legacy communication protocols.

• d.

  It uses a larger bit depth per character (such as 16 or 32 bits) or variable-width encoding, providing over a million unique code points.

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